指定为非空的参数是 null.SocketService

Question

我的代码：

override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int
    {
        if (!this.isRunning)
        {
            this.isRunning = true
            this.backgroundThread?.start()
        }

        return START_NOT_STICKY
    }

错误：

指定为非空的参数为空：方法co.okex.app.global.services.backgroundservices.SocketService.onStartCommand，参数意图

android.app.ActivityThread.handleServiceArgs (ActivityThread.java:3943)
android.app.ActivityThread.access00 (ActivityThread.java:218)
android.app.ActivityThread$H.handleMessage (ActivityThread.java:1832)
android.os.Handler.dispatchMessage (Handler.java:102)
android.os.Looper.loop (Looper.java:145)
android.app.ActivityThread.main (ActivityThread.java:6934)
java.lang.reflect.Method.invoke (Method.java)
java.lang.reflect.Method.invoke (Method.java:372)
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1404)
com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1199)

Answer 1

override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int

应该是

override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int

intent 可能为空，因此您必须允许接收 null 并在使用前检查 null。

请参考这个 onStartCommand

指定为非空的参数是 null.SocketService

Parameter specified as non-null is null.SocketService

java

android

kotlin

socketserver